javax.management.InstanceNotFoundException: com.oracle.jdbc:type=diagnosability,name=org.apache.catalina.loader.WebappClassLoader@929887595 at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getMBean(DefaultMBeanServerInterceptor.java:1095) at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.getAttribute(DefaultMBeanServerInterceptor.java:643) at com.sun.jmx.mbeanserver.JmxMBeanServer.getAttribute(JmxMBeanServer.java:678) at com.mes.tools.DB_Logger.(DB_Logger.java:33)